Snowsqualls that moved through the area Saturday evening caused whiteout conditions on Interstate 270 in Frederick and Montgomery counties and throughout the region, followed by snow-covered roads that made driving treacherous and slowed speeds on the highway to 20 mph or less on long stretches.

(Photo Credit: Beth Reardon/All-News 99.1)

The inner loop of the Capital Beltway shut down for more than five hours early Sunday morning following an accident that sent six people to hospitals, including two emergency workers who had responded a previous crash.

U.S. Park Police also warned drivers of icy conditions Sunday on the Baltimore-Washington Parkway.